// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_
#define CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_

#include <string>

#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "third_party/WebKit/public/platform/WebContentDecryptionModule.h"

namespace blink {
#if defined(ENABLE_PEPPER_CDMS)
class WebLocalFrame;
#endif
class WebSecurityOrigin;
}

namespace media {
class Decryptor;
class MediaKeys;
}

namespace content {

class CdmSessionAdapter;
#if defined(ENABLE_BROWSER_CDMS)
class RendererCdmManager;
#endif
class WebContentDecryptionModuleSessionImpl;

class WebContentDecryptionModuleImpl
    : public blink::WebContentDecryptionModule {
 public:
  static WebContentDecryptionModuleImpl* Create(
#if defined(ENABLE_PEPPER_CDMS)
      blink::WebLocalFrame* frame,
#elif defined(ENABLE_BROWSER_CDMS)
      RendererCdmManager* manager,
#endif
      const blink::WebSecurityOrigin& security_origin,
      const base::string16& key_system);

  virtual ~WebContentDecryptionModuleImpl();

  // Returns the Decryptor associated with this CDM. May be NULL if no
  // Decryptor associated with the MediaKeys object.
  // TODO(jrummell): Figure out lifetimes, as WMPI may still use the decryptor
  // after WebContentDecryptionModule is freed. http://crbug.com/330324
  media::Decryptor* GetDecryptor();

#if defined(ENABLE_BROWSER_CDMS)
  // Returns the CDM ID associated with this object. May be kInvalidCdmId if no
  // CDM ID is associated, such as when Clear Key is used.
  int GetCdmId() const;
#endif  // defined(ENABLE_BROWSER_CDMS)

  // blink::WebContentDecryptionModule implementation.
  virtual blink::WebContentDecryptionModuleSession* createSession(
      blink::WebContentDecryptionModuleSession::Client* client);

 private:
  // Takes reference to |adapter|.
  WebContentDecryptionModuleImpl(scoped_refptr<CdmSessionAdapter> adapter);

  scoped_refptr<CdmSessionAdapter> adapter_;

  DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleImpl);
};

// Allow typecasting from blink type as this is the only implementation.
inline WebContentDecryptionModuleImpl* ToWebContentDecryptionModuleImpl(
    blink::WebContentDecryptionModule* cdm) {
  return static_cast<WebContentDecryptionModuleImpl*>(cdm);
}

}  // namespace content

#endif  // CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_